src/game/java/net/minecraft/client/model/CowModel.java

package net.minecraft.client.model;

import java.util.Set;
import net.minecraft.client.model.geom.ModelPart;
import net.minecraft.client.model.geom.PartPose;
import net.minecraft.client.model.geom.builders.CubeListBuilder;
import net.minecraft.client.model.geom.builders.LayerDefinition;
import net.minecraft.client.model.geom.builders.MeshDefinition;
import net.minecraft.client.model.geom.builders.MeshTransformer;
import net.minecraft.client.model.geom.builders.PartDefinition;
import net.minecraft.client.renderer.entity.state.LivingEntityRenderState;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;

@OnlyIn(Dist.CLIENT)
public class CowModel extends QuadrupedModel<LivingEntityRenderState> {
    public static final MeshTransformer BABY_TRANSFORMER = new BabyModelTransform(false, 10.0F, 4.0F, Set.of("head"));

    public CowModel(ModelPart p_170515_) {
        super(p_170515_);
    }

    public static LayerDefinition createBodyLayer() {
        MeshDefinition meshdefinition = new MeshDefinition();
        PartDefinition partdefinition = meshdefinition.getRoot();
        int i = 12;
        partdefinition.addOrReplaceChild(
            "head",
            CubeListBuilder.create()
                .texOffs(0, 0)
                .addBox(-4.0F, -4.0F, -6.0F, 8.0F, 8.0F, 6.0F)
                .texOffs(22, 0)
                .addBox("right_horn", -5.0F, -5.0F, -4.0F, 1.0F, 3.0F, 1.0F)
                .texOffs(22, 0)
                .addBox("left_horn", 4.0F, -5.0F, -4.0F, 1.0F, 3.0F, 1.0F),
            PartPose.offset(0.0F, 4.0F, -8.0F)
        );
        partdefinition.addOrReplaceChild(
            "body",
            CubeListBuilder.create()
                .texOffs(18, 4)
                .addBox(-6.0F, -10.0F, -7.0F, 12.0F, 18.0F, 10.0F)
                .texOffs(52, 0)
                .addBox(-2.0F, 2.0F, -8.0F, 4.0F, 6.0F, 1.0F),
            PartPose.offsetAndRotation(0.0F, 5.0F, 2.0F, (float) (Math.PI / 2), 0.0F, 0.0F)
        );
        CubeListBuilder cubelistbuilder = CubeListBuilder.create().texOffs(0, 16).addBox(-2.0F, 0.0F, -2.0F, 4.0F, 12.0F, 4.0F);
        partdefinition.addOrReplaceChild("right_hind_leg", cubelistbuilder, PartPose.offset(-4.0F, 12.0F, 7.0F));
        partdefinition.addOrReplaceChild("left_hind_leg", cubelistbuilder, PartPose.offset(4.0F, 12.0F, 7.0F));
        partdefinition.addOrReplaceChild("right_front_leg", cubelistbuilder, PartPose.offset(-4.0F, 12.0F, -6.0F));
        partdefinition.addOrReplaceChild("left_front_leg", cubelistbuilder, PartPose.offset(4.0F, 12.0F, -6.0F));
        return LayerDefinition.create(meshdefinition, 64, 32);
    }

    public ModelPart getHead() {
        return this.head;
    }
}